利用接枝方式将2,2,6,6-四甲基哌啶(TEMPO)固载到SPE柱填料硅胶上制备了功能化硅胶,其吸附NOx应用于催化醇的选择性氧化反应中.并利用元素分析、红外光谱、N2吸附-脱附和NOx程序升温脱附对催化剂进行了考察.结果表明,所制备催化剂中TEMPO固载量为0.292mmol/g,NOx吸附量为0.749 mmol/g;常温常压下1 mmol芳香醇在0.5 g该催化剂作用下进行选择性氧化反应2 h,原料转化率和产物选择性均高达99％.该催化剂提高了醇分子在孔道内部与TEMPO和NOx接触几率,促进了反应进行,根据反应现象,对该体系催化机理进行了推测.
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